A Virginia bank company has a deal to move closer to the lucrative Washington market.

Southern Financial Bancorp plans to buy Horizon Bank of Virginia for $21 million in stock. Southern, based 80 miles from the nation's capital in Warrenton, has $258 million of assets and 13 branches.

Horizon, with $145 million of assets, is headquartered in Fairfax, a Washington suburb.

The deal "expands our operations into one of the fastest-growing areas in the state," said Georgia Derrico, chairman and chief executive officer of Southern Financial.

The deal is expected to close during the third quarter.

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